The output current can be calculated by multiplying the current given in the rating table
by the derating factor (k):
0.90
k
0.80
0.75
0.85
0.95
T
+40 °C
+104 °F
+50 °C
+122 °F
…
+45 °C
+113 °F
1.00
0.90
-15 °C
+5 °F
Surrounding air temperature derating, IP55 (UL Type 12)
IP55 (UL Type 12) drive types, other than the exceptions below
In the temperature range +40…50 °C (+104…122 °F), the rated output current is derated
by 1% for every added 1 °C (1.8 °F). The output current can be calculated by multiplying
the current given in the rating table by the derating factor (k):
T
1.00
0.90
+40 °C
+104 °F
+50 °C
+122 °F
k
0
.80
IP55 (UL Type 12) drive type -077A-4, -078A-4, -260A-4, -293A-4; -075A-2, -273A-2,
-276A-2; -099A-6, -125A-6, -144A-6
-077A-4 and -078A-4; -075A-2: In the temperature range +40…45 °C (+104…113 °F),
the rated output current is derated by 1% for every added 1 °C (1.8 °F). In the
temperature range +45…50 °C (+113…122 °F), the rated output current is derated by
2.5% for every added 1 °C (1.8 °F). The output current can be calculated by multiplying
the current given in the rating table by the derating factor (k):
Technical data 243
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